Heater with an atomizer nozzle

Abstract

A heater, especially for mobile applications, is provided which includes a burner for burning a liquid fuel, an atomizer nozzle located on the burner for atomizing the liquid fuel into extremely fine fuel droplets, and a fuel supply for feeding the liquid fuel to the atomizer nozzle. A heating means is provided on the atomizer nozzle with which the liquid fuel can be vaporized before and / or during its emergence from the atomizer nozzle.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a heater, especially for mobile applications, with a burner for burning a fossil liquid fuel, an atomizer nozzle which is located on the burner for atomizing the liquid fuel into extremely fine fuel droplets, and a fuel supply for feeding the liquid fuel to the atomizer nozzle. Furthermore the invention relates to a motor vehicle with such a heater and a process for operating a heater in which a liquid fossil fuel is supplied to an atomizer nozzle using a fuel supply. [0003] 2. Description of Related Art [0004] In heaters for mobile applications, burners for burning liquid fossil fuels are used. These burners are differentiated with respect to the type of combustion into atomizer burners and vaporizer burners. The atomizer burners are divided into two groups, so-called low pressure and so-called high pressure atomizer burners. In high pressure atomizer burners, the liquid fuel is del...

AI Technical Summary

Benefits of technology

[0013] Furthermore, the present invention is actually in contrast to the atomizer nozzle which is provided on the burner of the present invention and its operation, since the atomizer nozzle can no longer and will no longer atomize the gaseous fuel which has been vaporized, but introduces it simply as a gas jet into the combustion space of the burner. But it has been shown by the present invention that the gas jet of vaporized or pregasified fuel entails special advantages with respect to the formation of a mixture with the supplied combustion air in certain operating states of a heater so that, although the function of the atomizer nozzle is cancelled, fuel and combustion air are thoroughly mixed especially uniformly. When using the heater of the present invention, therefore, the aforementioned difficulties of fuel preparation and mixture formation, as are typical especially for a cold start of a low pressure atomizer burner, are eliminated.

[0029] To vaporize the liquid fuel, the heating means of the present invention can be preheated advantageously before feed of the liquid fuel during a time interval of roughly 2 to 10 seconds, especially from roughly 2 to 6 seconds, and most preferably roughly 5 seconds. This preheating time ensures that the heating means makes available the required amount of energy for prompt and comprehensive vaporization of a predetermined amount of liquid fuel.

Problems solved by technology

This causes a relatively long preheating phase which slows down the starting process.

However, with preheating, there is always the danger of gas bubble formation in the liquid fuel and thus a not inconsiderable disruption of combustion during the starting and operating phase of a burner.

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